One of your reviews indicates that you're botting. It's possible others are noticing it too and kinda figured at the price that's what they would get but didn't want to say anything in public. Lots of times, when you want to see what's up with a cheapo, you give it a try and think "oh, right, well that's what I expected." You're not happy with it but you kinda expected it. I'm thinking that's what happened with your feedback when people figure out you're botting.

I am worried to take my profile. If every update times decrease my profile Jss score then what can I do?

Be more honest - you overpromise and (it seems) underdeliver. It starts with your claimed English proficiency (your English is by no stretch of the imagination "fluent") and according to your private feedback too many of your clients are not happy.

You are concentrating on the wrong thing. Your JSS is not the problem, it is a symptom of the problem, unhappy clients are the problem.

If you sort out the problem and your clients are happier, then your JSS will go up by itself.